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4/00 UDC 3300 Controller Product Manual 183
5.17 Input Math Algorithms
Introduction
If selected via Math options, this controller has two input algorithms
available. Each algorithm can be configured to provide a derived
(calculated) PV or a derived remote setpoint. Up to three inputs may be
applied to the calculation. In addition, the two algorithms may be “linked”
to combine two calculations by configuring one algorithm to be an input
to the other algorithm.
Standard functionality:
• Basic models (DC330B) contain as standard: Weighted Average,
Feedforward Summer, Feedforward Multiplier.
• Expanded models (DC330E) provide as standard: Weighted Average,
Feedforward Summer, Feedforward Multiplier, Relative Humidity.
The Math option, which provides additional algorithms plus two
Characterizers, Totalizer, and Gain Scheduling, is available only on
Expanded Model DC330E-XX-XXX.
Input algorithm
selections
Algorithm selections are made in Section 3 – Configuration. The
following function prompts can be found in the Algorithm Set Up group:
IN ALG1
IN ALG2
These selections include the following algorithms:
Weighted Average
Feedforward Summer
Relative Humidity
Summer
Hi Select
Lo Select
√ Multiply Divide
√ Multiply
Multiply Divide
Multiply
Feedforward Multiplier
Carbon Potential (several types)
Dewpoint
The formulas for these selections are given in Table 4-5 in Section 4 –
Configuration Prompt Definitions.
Input A, Input B, and Input C selections for these formulas are found in
Section 4 – Configuration Prompt Definitions; Set Up group
ALGORTHM, under the following function prompts:
ALG1 INA
ALG1 INB
ALG1 INC
ALG2 INA
ALG2 INB
ALG2 INC